Try to help stabilize a test flake

The test AccessibilityIdentifierTests.testEnteringTextIntoViewWithAccessibilityIdentifier
is flaking unable to find 'Cut' after tapping 'Select All'. My best guess is that
the 'Select All' text field popover tap event isn't properly being processed, and thus
'Cut' isn't being found. Another possibility is that something is stealing first responder.

KIF Tests/AccessibilityIdentifierTests.m

@@ -57,6 +57,7 @@ - (void)testEnteringTextIntoViewWithAccessibilityIdentifier
 {
     [tester tapViewWithAccessibilityIdentifier:@"idGreeting"];
     [tester longPressViewWithAccessibilityIdentifier:@"idGreeting" duration:2];
+    [tester waitForAnimationsToFinish];
     [tester tapViewWithAccessibilityLabel:@"Select All"];
     [tester tapViewWithAccessibilityLabel:@"Cut"];
     [tester enterText:@"Yo" intoViewWithAccessibilityIdentifier:@"idGreeting"];